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993 lines
31 KiB
993 lines
31 KiB
package state
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import (
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"bytes"
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"errors"
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"fmt"
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acm "github.com/tendermint/tendermint/account"
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. "github.com/tendermint/tendermint/common"
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"github.com/tendermint/tendermint/events"
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ptypes "github.com/tendermint/tendermint/permission/types" // for GlobalPermissionAddress ...
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"github.com/tendermint/tendermint/types"
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"github.com/tendermint/tendermint/vm"
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)
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// NOTE: If an error occurs during block execution, state will be left
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// at an invalid state. Copy the state before calling ExecBlock!
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func ExecBlock(s *State, block *types.Block, blockPartsHeader types.PartSetHeader) error {
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err := execBlock(s, block, blockPartsHeader)
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if err != nil {
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return err
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}
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// State.Hash should match block.StateHash
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stateHash := s.Hash()
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if !bytes.Equal(stateHash, block.StateHash) {
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return errors.New(Fmt("Invalid state hash. Expected %X, got %X",
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stateHash, block.StateHash))
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}
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return nil
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}
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// executes transactions of a block, does not check block.StateHash
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// NOTE: If an error occurs during block execution, state will be left
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// at an invalid state. Copy the state before calling execBlock!
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func execBlock(s *State, block *types.Block, blockPartsHeader types.PartSetHeader) error {
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// Basic block validation.
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err := block.ValidateBasic(s.ChainID, s.LastBlockHeight, s.LastBlockHash, s.LastBlockParts, s.LastBlockTime)
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if err != nil {
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return err
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}
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// Validate block LastValidation.
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if block.Height == 1 {
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if len(block.LastValidation.Precommits) != 0 {
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return errors.New("Block at height 1 (first block) should have no LastValidation precommits")
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}
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} else {
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if len(block.LastValidation.Precommits) != s.LastBondedValidators.Size() {
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return errors.New(Fmt("Invalid block validation size. Expected %v, got %v",
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s.LastBondedValidators.Size(), len(block.LastValidation.Precommits)))
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}
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err := s.LastBondedValidators.VerifyValidation(
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s.ChainID, s.LastBlockHash, s.LastBlockParts, block.Height-1, block.LastValidation)
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if err != nil {
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return err
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}
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}
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// Update Validator.LastCommitHeight as necessary.
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for i, precommit := range block.LastValidation.Precommits {
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if precommit == nil {
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continue
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}
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_, val := s.LastBondedValidators.GetByIndex(i)
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if val == nil {
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PanicCrisis(Fmt("Failed to fetch validator at index %v", i))
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}
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if _, val_ := s.BondedValidators.GetByAddress(val.Address); val_ != nil {
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val_.LastCommitHeight = block.Height - 1
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updated := s.BondedValidators.Update(val_)
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if !updated {
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PanicCrisis("Failed to update bonded validator LastCommitHeight")
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}
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} else if _, val_ := s.UnbondingValidators.GetByAddress(val.Address); val_ != nil {
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val_.LastCommitHeight = block.Height - 1
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updated := s.UnbondingValidators.Update(val_)
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if !updated {
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PanicCrisis("Failed to update unbonding validator LastCommitHeight")
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}
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} else {
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PanicCrisis("Could not find validator")
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}
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}
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// Remember LastBondedValidators
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s.LastBondedValidators = s.BondedValidators.Copy()
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// Create BlockCache to cache changes to state.
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blockCache := NewBlockCache(s)
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// Execute each tx
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for _, tx := range block.Data.Txs {
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err := ExecTx(blockCache, tx, true, s.evc)
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if err != nil {
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return InvalidTxError{tx, err}
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}
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}
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// Now sync the BlockCache to the backend.
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blockCache.Sync()
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// If any unbonding periods are over,
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// reward account with bonded coins.
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toRelease := []*types.Validator{}
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s.UnbondingValidators.Iterate(func(index int, val *types.Validator) bool {
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if val.UnbondHeight+unbondingPeriodBlocks < block.Height {
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toRelease = append(toRelease, val)
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}
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return false
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})
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for _, val := range toRelease {
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s.releaseValidator(val)
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}
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// If any validators haven't signed in a while,
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// unbond them, they have timed out.
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toTimeout := []*types.Validator{}
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s.BondedValidators.Iterate(func(index int, val *types.Validator) bool {
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lastActivityHeight := MaxInt(val.BondHeight, val.LastCommitHeight)
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if lastActivityHeight+validatorTimeoutBlocks < block.Height {
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log.Notice("Validator timeout", "validator", val, "height", block.Height)
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toTimeout = append(toTimeout, val)
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}
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return false
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})
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for _, val := range toTimeout {
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s.unbondValidator(val)
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}
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// Increment validator AccumPowers
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s.BondedValidators.IncrementAccum(1)
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s.LastBlockHeight = block.Height
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s.LastBlockHash = block.Hash()
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s.LastBlockParts = blockPartsHeader
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s.LastBlockTime = block.Time
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return nil
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}
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// The accounts from the TxInputs must either already have
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// acm.PubKey.(type) != nil, (it must be known),
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// or it must be specified in the TxInput. If redeclared,
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// the TxInput is modified and input.PubKey set to nil.
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func getInputs(state AccountGetter, ins []*types.TxInput) (map[string]*acm.Account, error) {
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accounts := map[string]*acm.Account{}
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for _, in := range ins {
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// Account shouldn't be duplicated
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if _, ok := accounts[string(in.Address)]; ok {
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return nil, types.ErrTxDuplicateAddress
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}
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acc := state.GetAccount(in.Address)
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if acc == nil {
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return nil, types.ErrTxInvalidAddress
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}
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// PubKey should be present in either "account" or "in"
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if err := checkInputPubKey(acc, in); err != nil {
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return nil, err
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}
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accounts[string(in.Address)] = acc
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}
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return accounts, nil
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}
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func getOrMakeOutputs(state AccountGetter, accounts map[string]*acm.Account, outs []*types.TxOutput) (map[string]*acm.Account, error) {
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if accounts == nil {
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accounts = make(map[string]*acm.Account)
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}
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// we should err if an account is being created but the inputs don't have permission
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var checkedCreatePerms bool
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for _, out := range outs {
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// Account shouldn't be duplicated
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if _, ok := accounts[string(out.Address)]; ok {
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return nil, types.ErrTxDuplicateAddress
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}
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acc := state.GetAccount(out.Address)
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// output account may be nil (new)
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if acc == nil {
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if !checkedCreatePerms {
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if !hasCreateAccountPermission(state, accounts) {
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return nil, fmt.Errorf("At least one input does not have permission to create accounts")
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}
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checkedCreatePerms = true
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}
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acc = &acm.Account{
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Address: out.Address,
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PubKey: nil,
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Sequence: 0,
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Balance: 0,
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Permissions: ptypes.ZeroAccountPermissions,
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}
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}
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accounts[string(out.Address)] = acc
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}
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return accounts, nil
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}
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func checkInputPubKey(acc *acm.Account, in *types.TxInput) error {
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if acc.PubKey == nil {
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if in.PubKey == nil {
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return types.ErrTxUnknownPubKey
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}
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if !bytes.Equal(in.PubKey.Address(), acc.Address) {
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return types.ErrTxInvalidPubKey
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}
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acc.PubKey = in.PubKey
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} else {
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in.PubKey = nil
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}
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return nil
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}
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func validateInputs(accounts map[string]*acm.Account, signBytes []byte, ins []*types.TxInput) (total int64, err error) {
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for _, in := range ins {
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acc := accounts[string(in.Address)]
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if acc == nil {
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PanicSanity("validateInputs() expects account in accounts")
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}
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err = validateInput(acc, signBytes, in)
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if err != nil {
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return
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}
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// Good. Add amount to total
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total += in.Amount
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}
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return total, nil
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}
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func validateInput(acc *acm.Account, signBytes []byte, in *types.TxInput) (err error) {
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// Check TxInput basic
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if err := in.ValidateBasic(); err != nil {
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return err
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}
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// Check signatures
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if !acc.PubKey.VerifyBytes(signBytes, in.Signature) {
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return types.ErrTxInvalidSignature
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}
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// Check sequences
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if acc.Sequence+1 != in.Sequence {
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return types.ErrTxInvalidSequence{
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Got: in.Sequence,
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Expected: acc.Sequence + 1,
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}
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}
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// Check amount
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if acc.Balance < in.Amount {
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return types.ErrTxInsufficientFunds
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}
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return nil
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}
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func validateOutputs(outs []*types.TxOutput) (total int64, err error) {
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for _, out := range outs {
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// Check TxOutput basic
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if err := out.ValidateBasic(); err != nil {
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return 0, err
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}
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// Good. Add amount to total
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total += out.Amount
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}
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return total, nil
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}
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func adjustByInputs(accounts map[string]*acm.Account, ins []*types.TxInput) {
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for _, in := range ins {
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acc := accounts[string(in.Address)]
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if acc == nil {
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PanicSanity("adjustByInputs() expects account in accounts")
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}
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if acc.Balance < in.Amount {
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PanicSanity("adjustByInputs() expects sufficient funds")
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}
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acc.Balance -= in.Amount
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acc.Sequence += 1
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}
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}
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func adjustByOutputs(accounts map[string]*acm.Account, outs []*types.TxOutput) {
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for _, out := range outs {
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acc := accounts[string(out.Address)]
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if acc == nil {
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PanicSanity("adjustByOutputs() expects account in accounts")
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}
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acc.Balance += out.Amount
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}
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}
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// If the tx is invalid, an error will be returned.
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// Unlike ExecBlock(), state will not be altered.
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func ExecTx(blockCache *BlockCache, tx types.Tx, runCall bool, evc events.Fireable) (err error) {
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// TODO: do something with fees
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fees := int64(0)
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_s := blockCache.State() // hack to access validators and block height
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// Exec tx
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switch tx := tx.(type) {
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case *types.SendTx:
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accounts, err := getInputs(blockCache, tx.Inputs)
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if err != nil {
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return err
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}
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// ensure all inputs have send permissions
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if !hasSendPermission(blockCache, accounts) {
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return fmt.Errorf("At least one input lacks permission for SendTx")
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}
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// add outputs to accounts map
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// if any outputs don't exist, all inputs must have CreateAccount perm
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accounts, err = getOrMakeOutputs(blockCache, accounts, tx.Outputs)
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if err != nil {
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return err
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}
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signBytes := acm.SignBytes(_s.ChainID, tx)
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inTotal, err := validateInputs(accounts, signBytes, tx.Inputs)
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if err != nil {
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return err
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}
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outTotal, err := validateOutputs(tx.Outputs)
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if err != nil {
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return err
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}
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if outTotal > inTotal {
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return types.ErrTxInsufficientFunds
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}
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fee := inTotal - outTotal
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fees += fee
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// Good! Adjust accounts
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adjustByInputs(accounts, tx.Inputs)
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adjustByOutputs(accounts, tx.Outputs)
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for _, acc := range accounts {
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blockCache.UpdateAccount(acc)
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}
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// if the evc is nil, nothing will happen
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if evc != nil {
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for _, i := range tx.Inputs {
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evc.FireEvent(types.EventStringAccInput(i.Address), types.EventDataTx{tx, nil, ""})
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}
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for _, o := range tx.Outputs {
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evc.FireEvent(types.EventStringAccOutput(o.Address), types.EventDataTx{tx, nil, ""})
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}
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}
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return nil
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case *types.CallTx:
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var inAcc, outAcc *acm.Account
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// Validate input
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inAcc = blockCache.GetAccount(tx.Input.Address)
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if inAcc == nil {
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log.Info(Fmt("Can't find in account %X", tx.Input.Address))
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return types.ErrTxInvalidAddress
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}
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createContract := len(tx.Address) == 0
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if createContract {
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if !hasCreateContractPermission(blockCache, inAcc) {
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return fmt.Errorf("Account %X does not have CreateContract permission", tx.Input.Address)
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}
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} else {
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if !hasCallPermission(blockCache, inAcc) {
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return fmt.Errorf("Account %X does not have Call permission", tx.Input.Address)
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}
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}
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// pubKey should be present in either "inAcc" or "tx.Input"
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if err := checkInputPubKey(inAcc, tx.Input); err != nil {
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log.Info(Fmt("Can't find pubkey for %X", tx.Input.Address))
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return err
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}
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signBytes := acm.SignBytes(_s.ChainID, tx)
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err := validateInput(inAcc, signBytes, tx.Input)
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if err != nil {
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log.Info(Fmt("validateInput failed on %X: %v", tx.Input.Address, err))
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return err
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}
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if tx.Input.Amount < tx.Fee {
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log.Info(Fmt("Sender did not send enough to cover the fee %X", tx.Input.Address))
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return types.ErrTxInsufficientFunds
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}
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if !createContract {
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// Validate output
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if len(tx.Address) != 20 {
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log.Info(Fmt("Destination address is not 20 bytes %X", tx.Address))
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return types.ErrTxInvalidAddress
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}
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// check if its a native contract
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if vm.RegisteredNativeContract(LeftPadWord256(tx.Address)) {
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return fmt.Errorf("NativeContracts can not be called using CallTx. Use a contract or the appropriate tx type (eg. PermissionsTx, NameTx)")
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}
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// Output account may be nil if we are still in mempool and contract was created in same block as this tx
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// but that's fine, because the account will be created properly when the create tx runs in the block
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// and then this won't return nil. otherwise, we take their fee
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outAcc = blockCache.GetAccount(tx.Address)
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}
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log.Info(Fmt("Out account: %v", outAcc))
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// Good!
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value := tx.Input.Amount - tx.Fee
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inAcc.Sequence += 1
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inAcc.Balance -= tx.Fee
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blockCache.UpdateAccount(inAcc)
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// The logic in runCall MUST NOT return.
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if runCall {
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// VM call variables
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var (
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gas int64 = tx.GasLimit
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err error = nil
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caller *vm.Account = toVMAccount(inAcc)
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callee *vm.Account = nil // initialized below
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code []byte = nil
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ret []byte = nil
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txCache = NewTxCache(blockCache)
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params = vm.Params{
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BlockHeight: int64(_s.LastBlockHeight),
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BlockHash: LeftPadWord256(_s.LastBlockHash),
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BlockTime: _s.LastBlockTime.Unix(),
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GasLimit: _s.GetGasLimit(),
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}
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)
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if !createContract && (outAcc == nil || len(outAcc.Code) == 0) {
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// if you call an account that doesn't exist
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// or an account with no code then we take fees (sorry pal)
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// NOTE: it's fine to create a contract and call it within one
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// block (nonce will prevent re-ordering of those txs)
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// but to create with one contract and call with another
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// you have to wait a block to avoid a re-ordering attack
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// that will take your fees
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if outAcc == nil {
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log.Info(Fmt("%X tries to call %X but it does not exist.",
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inAcc.Address, tx.Address))
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} else {
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log.Info(Fmt("%X tries to call %X but code is blank.",
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inAcc.Address, tx.Address))
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}
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err = types.ErrTxInvalidAddress
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goto CALL_COMPLETE
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}
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// get or create callee
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if createContract {
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// We already checked for permission
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callee = txCache.CreateAccount(caller)
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log.Info(Fmt("Created new contract %X", callee.Address))
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code = tx.Data
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} else {
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callee = toVMAccount(outAcc)
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log.Info(Fmt("Calling contract %X with code %X", callee.Address, callee.Code))
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code = callee.Code
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}
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log.Info(Fmt("Code for this contract: %X", code))
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// Run VM call and sync txCache to blockCache.
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{ // Capture scope for goto.
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// Write caller/callee to txCache.
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txCache.UpdateAccount(caller)
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txCache.UpdateAccount(callee)
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vmach := vm.NewVM(txCache, params, caller.Address, types.TxID(_s.ChainID, tx))
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vmach.SetFireable(evc)
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// NOTE: Call() transfers the value from caller to callee iff call succeeds.
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ret, err = vmach.Call(caller, callee, code, tx.Data, value, &gas)
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if err != nil {
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// Failure. Charge the gas fee. The 'value' was otherwise not transferred.
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log.Info(Fmt("Error on execution: %v", err))
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goto CALL_COMPLETE
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}
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log.Info("Successful execution")
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if createContract {
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callee.Code = ret
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}
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txCache.Sync()
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}
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CALL_COMPLETE: // err may or may not be nil.
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// Create a receipt from the ret and whether errored.
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log.Notice("VM call complete", "caller", caller, "callee", callee, "return", ret, "err", err)
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// Fire Events for sender and receiver
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// a separate event will be fired from vm for each additional call
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if evc != nil {
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exception := ""
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if err != nil {
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exception = err.Error()
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}
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evc.FireEvent(types.EventStringAccInput(tx.Input.Address), types.EventDataTx{tx, ret, exception})
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evc.FireEvent(types.EventStringAccOutput(tx.Address), types.EventDataTx{tx, ret, exception})
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}
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} else {
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// The mempool does not call txs until
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// the proposer determines the order of txs.
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// So mempool will skip the actual .Call(),
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// and only deduct from the caller's balance.
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inAcc.Balance -= value
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if createContract {
|
|
inAcc.Sequence += 1
|
|
}
|
|
blockCache.UpdateAccount(inAcc)
|
|
}
|
|
|
|
return nil
|
|
|
|
case *types.NameTx:
|
|
var inAcc *acm.Account
|
|
|
|
// Validate input
|
|
inAcc = blockCache.GetAccount(tx.Input.Address)
|
|
if inAcc == nil {
|
|
log.Info(Fmt("Can't find in account %X", tx.Input.Address))
|
|
return types.ErrTxInvalidAddress
|
|
}
|
|
// check permission
|
|
if !hasNamePermission(blockCache, inAcc) {
|
|
return fmt.Errorf("Account %X does not have Name permission", tx.Input.Address)
|
|
}
|
|
// pubKey should be present in either "inAcc" or "tx.Input"
|
|
if err := checkInputPubKey(inAcc, tx.Input); err != nil {
|
|
log.Info(Fmt("Can't find pubkey for %X", tx.Input.Address))
|
|
return err
|
|
}
|
|
signBytes := acm.SignBytes(_s.ChainID, tx)
|
|
err := validateInput(inAcc, signBytes, tx.Input)
|
|
if err != nil {
|
|
log.Info(Fmt("validateInput failed on %X: %v", tx.Input.Address, err))
|
|
return err
|
|
}
|
|
// fee is in addition to the amount which is used to determine the TTL
|
|
if tx.Input.Amount < tx.Fee {
|
|
log.Info(Fmt("Sender did not send enough to cover the fee %X", tx.Input.Address))
|
|
return types.ErrTxInsufficientFunds
|
|
}
|
|
|
|
// validate the input strings
|
|
if err := tx.ValidateStrings(); err != nil {
|
|
return err
|
|
}
|
|
|
|
value := tx.Input.Amount - tx.Fee
|
|
|
|
// let's say cost of a name for one block is len(data) + 32
|
|
costPerBlock := types.NameCostPerBlock(types.NameBaseCost(tx.Name, tx.Data))
|
|
expiresIn := int(value / costPerBlock)
|
|
lastBlockHeight := _s.LastBlockHeight
|
|
|
|
log.Info("New NameTx", "value", value, "costPerBlock", costPerBlock, "expiresIn", expiresIn, "lastBlock", lastBlockHeight)
|
|
|
|
// check if the name exists
|
|
entry := blockCache.GetNameRegEntry(tx.Name)
|
|
|
|
if entry != nil {
|
|
var expired bool
|
|
// if the entry already exists, and hasn't expired, we must be owner
|
|
if entry.Expires > lastBlockHeight {
|
|
// ensure we are owner
|
|
if bytes.Compare(entry.Owner, tx.Input.Address) != 0 {
|
|
log.Info(Fmt("Sender %X is trying to update a name (%s) for which he is not owner", tx.Input.Address, tx.Name))
|
|
return types.ErrTxPermissionDenied
|
|
}
|
|
} else {
|
|
expired = true
|
|
}
|
|
|
|
// no value and empty data means delete the entry
|
|
if value == 0 && len(tx.Data) == 0 {
|
|
// maybe we reward you for telling us we can delete this crap
|
|
// (owners if not expired, anyone if expired)
|
|
log.Info("Removing namereg entry", "name", entry.Name)
|
|
blockCache.RemoveNameRegEntry(entry.Name)
|
|
} else {
|
|
// update the entry by bumping the expiry
|
|
// and changing the data
|
|
if expired {
|
|
if expiresIn < types.MinNameRegistrationPeriod {
|
|
return errors.New(Fmt("Names must be registered for at least %d blocks", types.MinNameRegistrationPeriod))
|
|
}
|
|
entry.Expires = lastBlockHeight + expiresIn
|
|
entry.Owner = tx.Input.Address
|
|
log.Info("An old namereg entry has expired and been reclaimed", "name", entry.Name, "expiresIn", expiresIn, "owner", entry.Owner)
|
|
} else {
|
|
// since the size of the data may have changed
|
|
// we use the total amount of "credit"
|
|
oldCredit := int64(entry.Expires-lastBlockHeight) * types.NameBaseCost(entry.Name, entry.Data)
|
|
credit := oldCredit + value
|
|
expiresIn = int(credit / costPerBlock)
|
|
if expiresIn < types.MinNameRegistrationPeriod {
|
|
return errors.New(Fmt("Names must be registered for at least %d blocks", types.MinNameRegistrationPeriod))
|
|
}
|
|
entry.Expires = lastBlockHeight + expiresIn
|
|
log.Info("Updated namereg entry", "name", entry.Name, "expiresIn", expiresIn, "oldCredit", oldCredit, "value", value, "credit", credit)
|
|
}
|
|
entry.Data = tx.Data
|
|
blockCache.UpdateNameRegEntry(entry)
|
|
}
|
|
} else {
|
|
if expiresIn < types.MinNameRegistrationPeriod {
|
|
return errors.New(Fmt("Names must be registered for at least %d blocks", types.MinNameRegistrationPeriod))
|
|
}
|
|
// entry does not exist, so create it
|
|
entry = &types.NameRegEntry{
|
|
Name: tx.Name,
|
|
Owner: tx.Input.Address,
|
|
Data: tx.Data,
|
|
Expires: lastBlockHeight + expiresIn,
|
|
}
|
|
log.Info("Creating namereg entry", "name", entry.Name, "expiresIn", expiresIn)
|
|
blockCache.UpdateNameRegEntry(entry)
|
|
}
|
|
|
|
// TODO: something with the value sent?
|
|
|
|
// Good!
|
|
inAcc.Sequence += 1
|
|
inAcc.Balance -= value
|
|
blockCache.UpdateAccount(inAcc)
|
|
|
|
// TODO: maybe we want to take funds on error and allow txs in that don't do anythingi?
|
|
|
|
if evc != nil {
|
|
evc.FireEvent(types.EventStringAccInput(tx.Input.Address), types.EventDataTx{tx, nil, ""})
|
|
evc.FireEvent(types.EventStringNameReg(tx.Name), types.EventDataTx{tx, nil, ""})
|
|
}
|
|
|
|
return nil
|
|
|
|
case *types.BondTx:
|
|
valInfo := blockCache.State().GetValidatorInfo(tx.PubKey.Address())
|
|
if valInfo != nil {
|
|
// TODO: In the future, check that the validator wasn't destroyed,
|
|
// add funds, merge UnbondTo outputs, and unbond validator.
|
|
return errors.New("Adding coins to existing validators not yet supported")
|
|
}
|
|
|
|
accounts, err := getInputs(blockCache, tx.Inputs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// add outputs to accounts map
|
|
// if any outputs don't exist, all inputs must have CreateAccount perm
|
|
// though outputs aren't created until unbonding/release time
|
|
canCreate := hasCreateAccountPermission(blockCache, accounts)
|
|
for _, out := range tx.UnbondTo {
|
|
acc := blockCache.GetAccount(out.Address)
|
|
if acc == nil && !canCreate {
|
|
return fmt.Errorf("At least one input does not have permission to create accounts")
|
|
}
|
|
}
|
|
|
|
bondAcc := blockCache.GetAccount(tx.PubKey.Address())
|
|
if !hasBondPermission(blockCache, bondAcc) {
|
|
return fmt.Errorf("The bonder does not have permission to bond")
|
|
}
|
|
|
|
if !hasBondOrSendPermission(blockCache, accounts) {
|
|
return fmt.Errorf("At least one input lacks permission to bond")
|
|
}
|
|
|
|
signBytes := acm.SignBytes(_s.ChainID, tx)
|
|
inTotal, err := validateInputs(accounts, signBytes, tx.Inputs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if !tx.PubKey.VerifyBytes(signBytes, tx.Signature) {
|
|
return types.ErrTxInvalidSignature
|
|
}
|
|
outTotal, err := validateOutputs(tx.UnbondTo)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if outTotal > inTotal {
|
|
return types.ErrTxInsufficientFunds
|
|
}
|
|
fee := inTotal - outTotal
|
|
fees += fee
|
|
|
|
// Good! Adjust accounts
|
|
adjustByInputs(accounts, tx.Inputs)
|
|
for _, acc := range accounts {
|
|
blockCache.UpdateAccount(acc)
|
|
}
|
|
// Add ValidatorInfo
|
|
_s.SetValidatorInfo(&types.ValidatorInfo{
|
|
Address: tx.PubKey.Address(),
|
|
PubKey: tx.PubKey,
|
|
UnbondTo: tx.UnbondTo,
|
|
FirstBondHeight: _s.LastBlockHeight + 1,
|
|
FirstBondAmount: outTotal,
|
|
})
|
|
// Add Validator
|
|
added := _s.BondedValidators.Add(&types.Validator{
|
|
Address: tx.PubKey.Address(),
|
|
PubKey: tx.PubKey,
|
|
BondHeight: _s.LastBlockHeight + 1,
|
|
VotingPower: outTotal,
|
|
Accum: 0,
|
|
})
|
|
if !added {
|
|
PanicCrisis("Failed to add validator")
|
|
}
|
|
if evc != nil {
|
|
// TODO: fire for all inputs
|
|
evc.FireEvent(types.EventStringBond(), types.EventDataTx{tx, nil, ""})
|
|
}
|
|
return nil
|
|
|
|
case *types.UnbondTx:
|
|
// The validator must be active
|
|
_, val := _s.BondedValidators.GetByAddress(tx.Address)
|
|
if val == nil {
|
|
return types.ErrTxInvalidAddress
|
|
}
|
|
|
|
// Verify the signature
|
|
signBytes := acm.SignBytes(_s.ChainID, tx)
|
|
if !val.PubKey.VerifyBytes(signBytes, tx.Signature) {
|
|
return types.ErrTxInvalidSignature
|
|
}
|
|
|
|
// tx.Height must be greater than val.LastCommitHeight
|
|
if tx.Height <= val.LastCommitHeight {
|
|
return errors.New("Invalid unbond height")
|
|
}
|
|
|
|
// Good!
|
|
_s.unbondValidator(val)
|
|
if evc != nil {
|
|
evc.FireEvent(types.EventStringUnbond(), types.EventDataTx{tx, nil, ""})
|
|
}
|
|
return nil
|
|
|
|
case *types.RebondTx:
|
|
// The validator must be inactive
|
|
_, val := _s.UnbondingValidators.GetByAddress(tx.Address)
|
|
if val == nil {
|
|
return types.ErrTxInvalidAddress
|
|
}
|
|
|
|
// Verify the signature
|
|
signBytes := acm.SignBytes(_s.ChainID, tx)
|
|
if !val.PubKey.VerifyBytes(signBytes, tx.Signature) {
|
|
return types.ErrTxInvalidSignature
|
|
}
|
|
|
|
// tx.Height must be in a suitable range
|
|
minRebondHeight := _s.LastBlockHeight - (validatorTimeoutBlocks / 2)
|
|
maxRebondHeight := _s.LastBlockHeight + 2
|
|
if !((minRebondHeight <= tx.Height) && (tx.Height <= maxRebondHeight)) {
|
|
return errors.New(Fmt("Rebond height not in range. Expected %v <= %v <= %v",
|
|
minRebondHeight, tx.Height, maxRebondHeight))
|
|
}
|
|
|
|
// Good!
|
|
_s.rebondValidator(val)
|
|
if evc != nil {
|
|
evc.FireEvent(types.EventStringRebond(), types.EventDataTx{tx, nil, ""})
|
|
}
|
|
return nil
|
|
|
|
case *types.DupeoutTx:
|
|
// Verify the signatures
|
|
_, accused := _s.BondedValidators.GetByAddress(tx.Address)
|
|
if accused == nil {
|
|
_, accused = _s.UnbondingValidators.GetByAddress(tx.Address)
|
|
if accused == nil {
|
|
return types.ErrTxInvalidAddress
|
|
}
|
|
}
|
|
voteASignBytes := acm.SignBytes(_s.ChainID, &tx.VoteA)
|
|
voteBSignBytes := acm.SignBytes(_s.ChainID, &tx.VoteB)
|
|
if !accused.PubKey.VerifyBytes(voteASignBytes, tx.VoteA.Signature) ||
|
|
!accused.PubKey.VerifyBytes(voteBSignBytes, tx.VoteB.Signature) {
|
|
return types.ErrTxInvalidSignature
|
|
}
|
|
|
|
// Verify equivocation
|
|
// TODO: in the future, just require one vote from a previous height that
|
|
// doesn't exist on this chain.
|
|
if tx.VoteA.Height != tx.VoteB.Height {
|
|
return errors.New("DupeoutTx heights don't match")
|
|
}
|
|
if tx.VoteA.Round != tx.VoteB.Round {
|
|
return errors.New("DupeoutTx rounds don't match")
|
|
}
|
|
if tx.VoteA.Type != tx.VoteB.Type {
|
|
return errors.New("DupeoutTx types don't match")
|
|
}
|
|
if bytes.Equal(tx.VoteA.BlockHash, tx.VoteB.BlockHash) {
|
|
return errors.New("DupeoutTx blockhashes shouldn't match")
|
|
}
|
|
|
|
// Good! (Bad validator!)
|
|
_s.destroyValidator(accused)
|
|
if evc != nil {
|
|
evc.FireEvent(types.EventStringDupeout(), types.EventDataTx{tx, nil, ""})
|
|
}
|
|
return nil
|
|
|
|
case *types.PermissionsTx:
|
|
var inAcc *acm.Account
|
|
|
|
// Validate input
|
|
inAcc = blockCache.GetAccount(tx.Input.Address)
|
|
if inAcc == nil {
|
|
log.Debug(Fmt("Can't find in account %X", tx.Input.Address))
|
|
return types.ErrTxInvalidAddress
|
|
}
|
|
|
|
permFlag := tx.PermArgs.PermFlag()
|
|
// check permission
|
|
if !HasPermission(blockCache, inAcc, permFlag) {
|
|
return fmt.Errorf("Account %X does not have moderator permission %s (%b)", tx.Input.Address, ptypes.PermFlagToString(permFlag), permFlag)
|
|
}
|
|
|
|
// pubKey should be present in either "inAcc" or "tx.Input"
|
|
if err := checkInputPubKey(inAcc, tx.Input); err != nil {
|
|
log.Debug(Fmt("Can't find pubkey for %X", tx.Input.Address))
|
|
return err
|
|
}
|
|
signBytes := acm.SignBytes(_s.ChainID, tx)
|
|
err := validateInput(inAcc, signBytes, tx.Input)
|
|
if err != nil {
|
|
log.Debug(Fmt("validateInput failed on %X: %v", tx.Input.Address, err))
|
|
return err
|
|
}
|
|
|
|
value := tx.Input.Amount
|
|
|
|
log.Debug("New PermissionsTx", "function", ptypes.PermFlagToString(permFlag), "args", tx.PermArgs)
|
|
|
|
var permAcc *acm.Account
|
|
switch args := tx.PermArgs.(type) {
|
|
case *ptypes.HasBaseArgs:
|
|
// this one doesn't make sense from txs
|
|
return fmt.Errorf("HasBase is for contracts, not humans. Just look at the blockchain")
|
|
case *ptypes.SetBaseArgs:
|
|
if permAcc = blockCache.GetAccount(args.Address); permAcc == nil {
|
|
return fmt.Errorf("Trying to update permissions for unknown account %X", args.Address)
|
|
}
|
|
err = permAcc.Permissions.Base.Set(args.Permission, args.Value)
|
|
case *ptypes.UnsetBaseArgs:
|
|
if permAcc = blockCache.GetAccount(args.Address); permAcc == nil {
|
|
return fmt.Errorf("Trying to update permissions for unknown account %X", args.Address)
|
|
}
|
|
err = permAcc.Permissions.Base.Unset(args.Permission)
|
|
case *ptypes.SetGlobalArgs:
|
|
if permAcc = blockCache.GetAccount(ptypes.GlobalPermissionsAddress); permAcc == nil {
|
|
PanicSanity("can't find global permissions account")
|
|
}
|
|
err = permAcc.Permissions.Base.Set(args.Permission, args.Value)
|
|
case *ptypes.HasRoleArgs:
|
|
return fmt.Errorf("HasRole is for contracts, not humans. Just look at the blockchain")
|
|
case *ptypes.AddRoleArgs:
|
|
if permAcc = blockCache.GetAccount(args.Address); permAcc == nil {
|
|
return fmt.Errorf("Trying to update roles for unknown account %X", args.Address)
|
|
}
|
|
if !permAcc.Permissions.AddRole(args.Role) {
|
|
return fmt.Errorf("Role (%s) already exists for account %X", args.Role, args.Address)
|
|
}
|
|
case *ptypes.RmRoleArgs:
|
|
if permAcc = blockCache.GetAccount(args.Address); permAcc == nil {
|
|
return fmt.Errorf("Trying to update roles for unknown account %X", args.Address)
|
|
}
|
|
if !permAcc.Permissions.RmRole(args.Role) {
|
|
return fmt.Errorf("Role (%s) does not exist for account %X", args.Role, args.Address)
|
|
}
|
|
default:
|
|
PanicSanity(Fmt("invalid permission function: %s", ptypes.PermFlagToString(permFlag)))
|
|
}
|
|
|
|
// TODO: maybe we want to take funds on error and allow txs in that don't do anythingi?
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// Good!
|
|
inAcc.Sequence += 1
|
|
inAcc.Balance -= value
|
|
blockCache.UpdateAccount(inAcc)
|
|
if permAcc != nil {
|
|
blockCache.UpdateAccount(permAcc)
|
|
}
|
|
|
|
if evc != nil {
|
|
evc.FireEvent(types.EventStringAccInput(tx.Input.Address), types.EventDataTx{tx, nil, ""})
|
|
evc.FireEvent(types.EventStringPermissions(ptypes.PermFlagToString(permFlag)), types.EventDataTx{tx, nil, ""})
|
|
}
|
|
|
|
return nil
|
|
|
|
default:
|
|
// binary decoding should not let this happen
|
|
PanicSanity("Unknown Tx type")
|
|
return nil
|
|
}
|
|
}
|
|
|
|
//---------------------------------------------------------------
|
|
|
|
// Get permission on an account or fall back to global value
|
|
func HasPermission(state AccountGetter, acc *acm.Account, perm ptypes.PermFlag) bool {
|
|
if perm > ptypes.AllPermFlags {
|
|
PanicSanity("Checking an unknown permission in state should never happen")
|
|
}
|
|
|
|
if acc == nil {
|
|
// TODO
|
|
// this needs to fall back to global or do some other specific things
|
|
// eg. a bondAcc may be nil and so can only bond if global bonding is true
|
|
}
|
|
permString := ptypes.PermFlagToString(perm)
|
|
|
|
v, err := acc.Permissions.Base.Get(perm)
|
|
if _, ok := err.(ptypes.ErrValueNotSet); ok {
|
|
if state == nil {
|
|
PanicSanity("All known global permissions should be set!")
|
|
}
|
|
log.Info("Permission for account is not set. Querying GlobalPermissionsAddress", "perm", permString)
|
|
return HasPermission(nil, state.GetAccount(ptypes.GlobalPermissionsAddress), perm)
|
|
} else if v {
|
|
log.Info("Account has permission", "address", Fmt("%X", acc.Address), "perm", permString)
|
|
} else {
|
|
log.Info("Account does not have permission", "address", Fmt("%X", acc.Address), "perm", permString)
|
|
}
|
|
return v
|
|
}
|
|
|
|
// TODO: for debug log the failed accounts
|
|
func hasSendPermission(state AccountGetter, accs map[string]*acm.Account) bool {
|
|
for _, acc := range accs {
|
|
if !HasPermission(state, acc, ptypes.Send) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func hasNamePermission(state AccountGetter, acc *acm.Account) bool {
|
|
return HasPermission(state, acc, ptypes.Name)
|
|
}
|
|
|
|
func hasCallPermission(state AccountGetter, acc *acm.Account) bool {
|
|
return HasPermission(state, acc, ptypes.Call)
|
|
}
|
|
|
|
func hasCreateContractPermission(state AccountGetter, acc *acm.Account) bool {
|
|
return HasPermission(state, acc, ptypes.CreateContract)
|
|
}
|
|
|
|
func hasCreateAccountPermission(state AccountGetter, accs map[string]*acm.Account) bool {
|
|
for _, acc := range accs {
|
|
if !HasPermission(state, acc, ptypes.CreateAccount) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func hasBondPermission(state AccountGetter, acc *acm.Account) bool {
|
|
return HasPermission(state, acc, ptypes.Bond)
|
|
}
|
|
|
|
func hasBondOrSendPermission(state AccountGetter, accs map[string]*acm.Account) bool {
|
|
for _, acc := range accs {
|
|
if !HasPermission(state, acc, ptypes.Bond) {
|
|
if !HasPermission(state, acc, ptypes.Send) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
type InvalidTxError struct {
|
|
Tx types.Tx
|
|
Reason error
|
|
}
|
|
|
|
func (txErr InvalidTxError) Error() string {
|
|
return Fmt("Invalid tx: [%v] reason: [%v]", txErr.Tx, txErr.Reason)
|
|
}
|